Hi bbekzclz11,
Sorry just seen your message and all I can say is I import STEP files from Fusion 360, by exporting to my computer from Fusion 360, then I upload file from my computer to Simscale. I now use STEP as it is preferred over Stl as I recall. I’ve not had problems with my Step files. However, on very very close zooming into a curved line I see it is made up of straight segments, which I think may be down to Fusion 360 and other CAD programs of how they deal with curved lines.
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